Lead Software Site Reliability Engineer - Defence

Job Description

Get to Know the Team

GrabDefence builds technology that helps protect users and businesses from fraud and abuse. Our engineers work across security, infrastructure and product teams to support reliable systems that can scale with evolving threats.

You will join a team that values shared ownership and continuous improvement. Your work will help engineers manage infrastructure securely and spend more time building capabilities that protect customers.

Get to Know the Role

As a Lead Software Reliability Engineer, you will drive the infrastructure and operational tooling that support GrabDefence. You will partner closely with Grab's central site reliability engineering (SRE) team to manage Amazon Web Services (AWS) resources, support infrastructure migrations and make operations easier through automation and AI-enabled tools.

You will report to Senior Engineering Manager in Singapore. This role is based in Beijing, China. You will have opportunities to shape infrastructure strategy, lead technical initiatives and guide other engineers.

If you enjoy building secure infrastructure and making complex operations simpler, we encourage you to apply.

The Critical Tasks You Will Perform

• You will design and manage AWS infrastructure—including networking, storage, compute and databases—to support reliable and scalable GrabDefence services.
• You will partner with the central SRE team to deliver infrastructure capabilities, clarify ownership and align operational practices across shared and GrabDefence environments.
• You will plan and execute infrastructure maintenance and migrations, managing dependencies and rollback plans to minimise service disruption.
• You will implement infrastructure policies and access controls, including identity and access management, least-privilege permissions and configuration guardrails.
• You will build and improve infrastructure management and orchestration tools that make provisioning, changes and routine operations easier and more consistent.
• You will use generative AI and develop AI-enabled tooling where appropriate to accelerate investigations, documentation and operational workflows, with safeguards and human review for consequential changes.
• You will improve reliability through monitoring, incident response, root-cause analysis and automation that reduces recurring operational work.

Qualifications

What Essential Skills You Will Need

• You have at least 8 years of experience in software engineering, site reliability engineering or infrastructure engineering, including hands-on responsibility for production systems.
• You have deep hands-on experience designing, operating and troubleshooting AWS infrastructure across networking, storage, compute and managed databases.
• You have experience implementing AWS identity and access management, security policies and least-privilege access controls.
• You have experience using infrastructure as code to provision, maintain and safely change cloud resources.
• You have experience programming in a language such as Python or Go to build automation, operational tools or infrastructure platforms.
• You have experience leading production infrastructure changes or migrations, including risk assessment, monitoring, incident response and recovery.
• You have experience engaging with AI tools and emerging technologies to enhance productivity, improve workflows and contribute new ideas.

Good to Have

• Experience building self-service infrastructure platforms or orchestration tools.
• Experience designing AI-agent workflows with appropriate access controls and human oversight.
• Proficiency in CI/CD tools (Jenkins, GitLab, etc.)
• Experience with a non-relational / noSQL database such as Elasticsearch or DynamoDB

Additional Information

Life at Grab

We care about your well-being at Grab, here are some of the global benefits we offer:

• We have your back with Term Life Insurance and comprehensive Medical Insurance.
• With GrabFlex, create a benefits package that suits your needs and aspirations.
• Celebrate moments that matter in life with loved ones through Parental and Birthday leave, and give back to your communities through Love-all-Serve-all (LASA) volunteering leave
• We have a confidential Grabber Assistance Programme to guide and uplift you and your loved ones through life's challenges.
• Balancing personal commitments and life's demands are made easier with our FlexWork arrangements such as differentiated hours

What We Stand For at Grab

We are committed to building an inclusive and equitable workplace that enables diverse Grabbers to grow and perform at their best. As an equal opportunity employer, we consider all candidates fairly and equally regardless of nationality, ethnicity, religion, age, gender identity, sexual orientation, family commitments, physical and mental impairments or disabilities, and other attributes that make them unique.